When PACS Stops, How Much of the Hospital Stops With It?
Treating PACS downtime as only an IT incident is too narrow.
PACS is part of the clinical operation. When it becomes unavailable, the issue is not confined to a server, an application, or the radiology department. Reading is affected. Imaging operations are affected. And the impact can move into the clinical services that depend on imaging to make decisions and keep care moving.
The Business Continuity question is not simply:
How quickly can we bring PACS back?
It is:
When PACS stops, how much of the hospital stops with it?
Downtime is not a hypothetical problem
Healthcare organizations are already seeing what happens when critical systems become unavailable. Downtime has an operational cost long before the technology is fully restored.
Drop in hospital volume
Observed during the initial week of ransomware attacks in a 2026 peer-reviewed study, demonstrating rapid clinical impact.
Estimated unfavorable impact
Reported by Universal Health Services from a 2020 cyberattack, attributed to billing delays and lower patient activity.
Revenue impact per day
Reported by nearly 60% of impacted hospitals surveyed by the AHA after the 2024 Change Healthcare disruption.
These are healthcare-wide technology disruptions, not estimates of PACS-specific financial loss. But they establish an important point:
For hospital leaders, the question is no longer simply: Could disruption happen?
A more useful question is: How much of the operation can continue when it does?
PACS downtime does not stay in radiology
PACS is not simply another application waiting for IT to restore it. It supports a continuous clinical workflow.
Radiologists
Need studies to interpret and report on to guide patient care.
Imaging Teams
Need to route, manage, and track the flow of work across the enterprise.
Clinicians
Need imaging access to support diagnosis, treatment planning, and patient discussions.
Acute & Surgery
Surgery, screening, and intervention rely completely on immediate imaging access.
PACS has long been described in the imaging literature as a mission-critical system for around-the-clock clinical operations. Research on enterprise PACS has also emphasized that downtime can interrupt clinical data flow and affect the broader operation of a filmless healthcare environment.
This is what makes PACS Business Continuity different from treating the event as ordinary IT downtime. The technology problem may begin in one system. The operational problem can spread much further.
Recovery does not close the continuity gap
Every organization needs a plan for restoring its primary PACS. But restoration and continuity solve different problems.
Recovery
Asks how the primary environment comes back.
Recovery has a timeline. Whether restoration takes minutes, hours, or longer, clinical activity does not simply wait. Studies continue to arrive. A recovery plan can be technically sound while leaving an operational gap.
Continuity
Asks how the organization operates until it does.
What are people actually working on while the primary PACS is unavailable? Continuity moves beyond backup and restoration. It becomes a question of maintaining critical clinical operations during disruption.
A second copy is not automatically continuity
Having another copy of data is important. Having a recovery environment is important. But neither automatically means the organization can maintain its critical workflows when the primary PACS is unavailable.
The more useful test is operational: What remains usable during the disruption?
A continuity environment should be examined not simply by whether it exists, but by whether it can support the workflows the organization has decided must continue. That includes whether teams can move into it, whether the necessary information remains accessible, and whether the transition process is understood.
There is evidence that designing specifically for workflow continuity can materially reduce the effect of PACS downtime. A study of a healthcare organization spanning 20 hospitals reported a 94% reduction in downtime during which radiologists could not continue their normal PACS workflow. The important point is that continuity can be designed around the clinical workflow, not just the recovery of the technology.
Independence matters when the primary environment does not
There is another issue that becomes important once an organization moves beyond basic backup and recovery: How independent is the continuity environment from the primary environment?
Two environments can appear separate and still share dependencies. If disruption to the primary environment can also make the continuity environment unavailable, then the organization may discover that its alternative is least useful at the exact moment it is needed most.
The continuity environment should be meaningfully separate from the primary environment, with shared dependencies and independence treated as deeper technical considerations that require validation.
Because a continuity strategy that depends too heavily on the environment it is supposed to protect against may leave the same operational gap when disruption occurs.
The real test is operational readiness
Architecture matters. But continuity ultimately has to work with real people, under real conditions.
An organization can have documented recovery plans and secondary systems while still being uncertain about what happens when the primary PACS becomes unavailable. That is why readiness should be tested around the operating reality:
- What can teams move to?
- How independent is that environment?
- How quickly can critical workflows continue?
- Is the transition process understood and tested?
- Are responsibilities clear when an incident occurs?
A continuity strategy should be able to answer those questions before the organization is forced to answer them during an outage.
How ready is your continuity approach?
Assess Your Imaging Continuity ReadinessBusiness Continuity is a clinical operating strategy
The traditional question around PACS resilience has been: How quickly can we recover the system?
That question still matters. But it is no longer enough on its own. A hospital also needs to know what happens between the moment the primary PACS becomes unavailable and the moment normal operations are restored.
What keeps working? What does not? What can teams move to? Which clinical workflows remain supported? And which shared dependencies could turn one technical disruption into a much wider operational problem?
PACS Business Continuity is therefore not simply a technology safeguard.
It is part of the hospital's ability to keep care moving when a critical clinical system cannot.
Because when PACS stops, the most important measure is not only how quickly the technology comes back. It is how much of the hospital can keep moving until it does.
Sources
- American Economic Association, hospital ransomware study (2026)
- Universal Health Services, Annual Report / Form 10-K
- American Hospital Association survey on the Change Healthcare cyberattack (2024)
- PACS workflow continuity study, PubMed PMID 22766799
- PACS mission-critical operations study, PubMed PMID 12620307
